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Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages
Sanders - Genetic Analysis: An Integrated Approach 3rd Edition
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172Not the one you use?Change textbook
Chapter 6, Problem 21b

Penicillin was first used in the 1940s to treat gonorrhea infections produced by the bacterium Neisseria gonorrhoeae. In 1984, according to the CDC, fewer than 1% of gonorrhea infections were caused by penicillin-resistant N. gonorrhoeae. By 1990, more than 10% of cases were penicillin-resistant, and a few years later the level of resistance was at greater than 95%. Almost every year the CDC issues new treatment guidelines for gonorrhea that identify the recommended antibiotic drugs and dosages.
What are the short-term implications of these frequent changes for physicians and clinics that treat sexually transmitted diseases like gonorrhea and for individuals infected with gonorrhea?

Verified step by step guidance
1
Understand the context: The problem discusses the increasing resistance of Neisseria gonorrhoeae to penicillin and the frequent updates to treatment guidelines issued by the CDC. This highlights the issue of antibiotic resistance and its implications for treatment strategies.
Explain the short-term implications for physicians and clinics: Physicians and clinics must stay updated with the latest CDC guidelines to ensure they are prescribing effective antibiotics. This requires continuous education, access to updated resources, and potentially more frequent training sessions.
Discuss the short-term implications for individuals infected with gonorrhea: Patients may face challenges such as delays in receiving effective treatment if outdated antibiotics are prescribed. They may also need to undergo additional testing or treatments if the initial therapy fails due to resistance.
Highlight the logistical challenges: Frequent changes in treatment guidelines may lead to increased costs for clinics to stock new antibiotics and for patients to access these medications. Additionally, there may be a need for improved diagnostic tools to quickly identify resistant strains.
Emphasize the importance of public health measures: Short-term efforts should also focus on educating the public about the importance of completing prescribed antibiotic courses, practicing safe sex, and reducing the spread of resistant strains through awareness campaigns.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Antibiotic Resistance

Antibiotic resistance occurs when bacteria evolve to resist the effects of medications that once effectively treated infections. In the case of Neisseria gonorrhoeae, the rapid increase in penicillin resistance highlights how bacteria can adapt quickly to selective pressures, such as the widespread use of antibiotics. This phenomenon complicates treatment options and necessitates ongoing research and adaptation in medical guidelines.
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Treatment Guidelines

Treatment guidelines are systematically developed statements that assist healthcare providers in making decisions about appropriate healthcare for specific clinical circumstances. The CDC's annual updates for gonorrhea treatment reflect the need to adapt to changing patterns of antibiotic resistance, ensuring that physicians have the most effective and current information to treat infections. These guidelines are crucial for maintaining effective patient care and public health.
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Public Health Implications

Frequent changes in treatment guidelines due to antibiotic resistance have significant public health implications. For physicians and clinics, this means they must stay informed and adjust their practices to ensure effective treatment, which can strain resources and require ongoing education. For individuals infected with gonorrhea, these changes can lead to delays in effective treatment, increased risk of complications, and the potential for further transmission of resistant strains.
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Textbook Question

A triple-auxotrophic strain of E. coli having the genotype phe⁻ met⁻ ara⁻ is used as a recipient strain in a transduction experiment. The strain is unable to synthesize its own phenylalanine or methionine, and it carries a mutation that leaves it unable to utilize the sugar arabinose for growth. The recipient is crossed to a prototrophic strain with the genotype phe⁺ met⁺ ara⁺. The table below shows the selected marker and gives cotransduction frequencies for the unselected markers.

Use the cotransduction data to determine the order of these genes.

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Textbook Question

A triple-auxotrophic strain of E. coli having the genotype phe⁻ met⁻ ara⁻ is used as a recipient strain in a transduction experiment. The strain is unable to synthesize its own phenylalanine or methionine, and it carries a mutation that leaves it unable to utilize the sugar arabinose for growth. The recipient is crossed to a prototrophic strain with the genotype phe⁺ met⁺ ara⁺. The table below shows the selected marker and gives cotransduction frequencies for the unselected markers.

Identify the compounds present in each of the selective media.

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Textbook Question

Penicillin was first used in the 1940s to treat gonorrhea infections produced by the bacterium Neisseria gonorrhoeae. In 1984, according to the CDC, fewer than 1% of gonorrhea infections were caused by penicillin-resistant N. gonorrhoeae. By 1990, more than 10% of cases were penicillin-resistant, and a few years later the level of resistance was at greater than 95%. Almost every year the CDC issues new treatment guidelines for gonorrhea that identify the recommended antibiotic drugs and dosages.

Why is the CDC so active in making these recommendations?

668
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Textbook Question

Penicillin was first used in the 1940s to treat gonorrhea infections produced by the bacterium Neisseria gonorrhoeae. In 1984, according to the CDC, fewer than 1% of gonorrhea infections were caused by penicillin-resistant N. gonorrhoeae. By 1990, more than 10% of cases were penicillin-resistant, and a few years later the level of resistance was at greater than 95%. Almost every year the CDC issues new treatment guidelines for gonorrhea that identify the recommended antibiotic drugs and dosages.

What are the long-term implications of these frequent changes in treatment recommendations for the patient population?

537
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Textbook Question

An attribute of growth behavior of eight bacteriophage mutants (1 to 8) is investigated in experiments that establish coinfection by pairs of mutants. The experiments determine whether the mutants complement one another (+) or fail to complement (-). These eight mutants are known to result from point mutation. The results of the complementation tests are shown below.

How many genes are represented by these mutations?

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Textbook Question

An attribute of growth behavior of eight bacteriophage mutants (1 to 8) is investigated in experiments that establish coinfection by pairs of mutants. The experiments determine whether the mutants complement one another (+) or fail to complement (-). These eight mutants are known to result from point mutation. The results of the complementation tests are shown below.

Identify the mutants of each gene.

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